727 vs 904?

Well, growing up I remember this was never even a question - the 727 was the only way to go - now, "they" have done so much with the 904 that it is a point of fairly strong debate, and from what I have heard and read, it's for good reason. I've never used anything but a 727 and have yet to have a transmission fail - I have been accused of some "spirited" driving in my day.. dats all.